但对分集增益而言，网格空时码和分组空时码均可达到系统所能提供的最大分集增益，而分层空时码由于受实现方式的制约，只能得到其中一部分分集增益。
But as to the diversity gains, STCM and STBC can achieve the maximum diversity that the system provides, while LST only obtains a small part of it because of its limited application.
空时码的提出为解决无线通信系统中的传输速率问题提供了一条新思路，目前已经成为通信研究的一个热点。
Space-time code indicates a new idea of providing high transmission rate in wireless communication systems and has recently received considerable attention.
对于使用阵列天线的直接序列扩谱系统，提出使用空时相关器方法实现码捕获和自适应波束形成权值捕获。
For DSSS system with antenna array, the spatial-temporal correlator (STC) is proposed for the acquisition of the PN code and adaptive beamforming weight.
针对多输入多输出系统中现有的线性分散(LD)空时码编、解码复杂度高的问题，提出了一类正交线性分散(old)空时编码。
Focusing on the problem that existing linear dispersion (LD) space-time codes have a high encoding and decoding complexity, a type of orthogonal linear dispersion (OLD) space-time codes is proposed.
在介绍空时码的MIMO信息论基础上，系统地对三类空时码进行了分析比较。
In this paper, after introducing MIMO information theory about sp ace time code, three kinds of space time code are compared and analyzed systematically.
基于OFDM(正交频分复用)系统，提出了一种新的空频时三维编码，将网格编码调制和差分空时分组码进行组合链接设计。
Based on OFDM system, a novel space-frequency-time code which combined trellis-coded modulation with differential space-time block code was proposed.
主要介绍了发射分集技术中用于抗信道衰落和提高系统容量的空时分组码和分层空时码的原理和基本特点，并对这些空时编码技术进行了性能分析。
To overcome the bad performance in combating fading of BLAST and low code rate of STBC, a layered structure STBC is introduced in this article by combining BLAST and STBC.
主要介绍了发射分集技术中用于抗信道衰落和提高系统容量的空时分组码和分层空时码的原理和基本特点，并对这些空时编码技术进行了性能分析。
To overcome the bad performance in combating fading of BLAST and low code rate of STBC, a layered structure STBC is introduced in this article by combining BLAST and STBC.
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